Welcome!This site serves as the distribution point for the "trial ware" data analysis programs SVEDBERG and DCDT+ developed by John Philo.
Each of these programs has its own page with descriptions of its features and other information. You can download these programs for a free trial from the Download page.
John Philo's public domain ("freeware") program XLGraph is also available here from the Download page.
The public domain program SEDNTERP is now supported and distributed through the Biomolecular Interaction Technologies Center (BITC) at the University of New Hampshire (the distribution and Help files can be found here.)
If you are interested in custom software for data analysis, data conversions, or database applications visit the Custom Software page.
The links page points to many useful web resources for analytical ultracentrifugation, other biophysical techniques, and other helpful sites for protein chemists.